McKinstry C T, Inaba M, Anthony J N
J Dermatol Surg Oncol. 1979 May;5(5):407-11. doi: 10.1111/j.1524-4725.1979.tb00682.x.
From our experience, the most important requirement for permanent epilation by electrocoagulation is not only to destroy hair bulbs, but also to destroy the isthmal regions of hair follicles and the sebaceous glands.